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參數資料
| 型號： | DAC8408AT |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| 中文描述： | QUAD, PARALLEL, 8 BITS INPUT LOADING, 0.19 us SETTLING TIME, 8-BIT DAC, CDIP28 |
| 封裝： | CERDIP-28 |
| 文件頁數： | 13/16頁 |
| 文件大小： | 217K |
| 代理商： | DAC8408AT |
DAC8408
–13–
REV. A
Figure 9. A Digitally Programmable Universal Active Filter
Figure 10. Programmable Active Filter Band-Pass
Frequency Response
All components used are available off-the-shelf. Using low drift
thin-film resistors, the DAC8408 exhibits very stable perfor-
mance over temperature. T he wide bandwidth of the OP-470
produces excellent high frequency and high Q response. In addi-
tion, the OP470’s low input offset voltage assures an unusually
low dc offset at the filter output.
A DIGIT ALLY PROGRAMMABLE ACT IVE FILT E R
A powerful D/A converter application is a programmable active
filter design as shown in Figure 9. T he design is based on the
state-variable filter topology which offers stable and repeatable
filter characteristics. DAC B and DAC D can be programmed in
tandem with a single digital byte load which sets the center fre-
quency of the filter. DAC A sets the Q of the filter. DAC C sets
the gain of the filter transfer function. T he unique feature of this
design is that varying the gain of filter does not affect the Q of
the filter. Similarly, the reverse is also true. T his makes the pro-
grammability of the filter extremely reliable and predictable.
Note that low-pass, high-pass, and bandpass outputs are avail-
able. T his sophisticated function is achieved in only two IC
packages.
T he network analyzer photo shown in Figure 10 superimposes
five actual bandpass responses ranging from the lowest fre-
quency of 75 Hz (1 LSB ON) to a full-scale frequency of 19.132
kHz (all bits ON), which is equivalent to a 256 to 1 dynamic
range. T he frequency is determined by f
C
= 1/2
π
RC where R is
the ladder resistance (R
IN
) of the DAC8408, and C is 1000 pF.
Note that from device to device, the resistance R
IN
varies. T hus
some tuning may be necessary.
相關PDF資料 |
PDF描述 |
|---|---|
| DAC8408BT | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| DAC8408ET | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| DAC8408FP | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| DAC8408FPC | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| DAC8408FS | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DAC8408AT/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Digital-to-Analog Converter |
| DAC8408AT/883C | 功能描述:數模轉換器- DAC QUAD 8-BIT CMOS DAC-LEV.B RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC8408AT2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| DAC8408BIET | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| DAC8408BIGP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
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